2284.     MILLIGAN, W. O., AND HOLMES, J.  X-ray Diffraction Studies in the System CuO-Fe2O3.  Jour. Am. Chem. Soc., vol. 63, 1941, p. 149-150; Chem. Abs., vol. 35, 1941, p. 1336.

        Report of the results of a systematic X-ray study of mixtures of varying composition of cupric and ferric oxides, which were precipitated at 25, aged under water at 100, and heated to 1,000.  The radiograms show no indication of the formation of cupric ferrite on precipitation at 25 or on aging the precipitate at 100.  In the samples heated to 1,000, CuFe2O4 is formed; it is the only compound formed in the system CuO-Fe2O3.